Tunable lattice strain in vertically aligned nanocomposite (BiFeO3)x:(Sm2O3)1−x thin films
- 1 November 2009
- journal article
- research article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 106 (9), 094309
- https://doi.org/10.1063/1.3257175
Abstract
Unique epitaxial two-phase vertically aligned nanocomposite (VAN) ( BiFeO 3 ) x : ( Sm 2 O 3 ) 1 − x thin films were deposited on SrTiO 3 (001) substrates by pulsed laser deposition. The VAN thin films exhibit a highly ordered vertical columnar structure with high epitaxial quality. We demonstrate that the strains of the two phases in both out-of-plane and in-plane directions can be tuned by the deposition parameters during growth, e.g., deposition frequency and film composition of the nanocomposite. The strain tunability is found to be directly related to the systematic variation in the column widths in the nanocomposite. The dielectric property measurement shows that increasing vertical strain control will lead to a systematic dielectric loss reduction in the VAN thin films. This study suggests a promising avenue in achieving tunable strain in functional oxide thin films by using VAN structures.Keywords
This publication has 21 references indexed in Scilit:
- Multiferroic properties of sputtered BiFeO3 thin filmsApplied Physics Letters, 2008
- Strain control and spontaneous phase ordering in vertical nanocomposite heteroepitaxial thin filmsNature Materials, 2008
- Epitaxial Multiferroic BiFeO3Thin Films: Progress and Future DirectionsFerroelectrics, 2007
- Self‐Assembled Growth of BiFeO3–CoFe2O4 NanostructuresAdvanced Materials, 2006
- Crystal structure and ferroelectric properties of rare-earth substituted BiFeO3 thin filmsJournal of Applied Physics, 2006
- Multiferroic BaTiO 3 -CoFe 2 O 4 NanostructuresScience, 2004
- Structural phase transition at the percolation threshold in epitaxial (La0.7Ca0.3MnO3)1–x:(MgO)x nanocomposite filmsNature Materials, 2003
- Epitaxial BiFeO 3 Multiferroic Thin Film HeterostructuresScience, 2003
- Discovery of the linear magnetoelectric effect in magnetic ferroelectric BiFeo3in a strong magnetic fieldFerroelectrics, 1994
- Magnetoelectric (Bi, Ln)Feo3compounds: Crystal growth, structure and propertiesFerroelectrics, 1994